张思民安卓-第三次作业

张思民安卓 第三次作业(6页)Good is good, but better carries it

精益求精，善益求善

Xml: Java:package com

example

androidclass3;import android

support

AppCompatActivity;import android

Bundle;import android

View;import android

widget

Button;import android

widget

ImageView;public class MainActivity extends AppCompatActivity implements View

OnClickListener{ private Button button1,button2; private ImageView imageView; private int [] imgs ={R

mipmap

img1, R

mipmap

img2,R

mipmap

img3,R

mipmap

img4,R

mipmap

img5,R

mipmap

img6}; int index = 0; final int upper_limit=6; final int lower_limit=-1; @Override protected void onCreate(Bundle savedInstanceState) { super

onCreate(savedInstanceState); setContentView(R

layout

activity_main); button1 = (Button) findViewById(R

front); button2 = (Button) findV